Electrical transformer



H. l.. IDE.

ELECTRICAL TRANSFORMER.

APPLlcArlou nLEn oc.s,1s2o.

1,394,555. Patented oen 25, 1.921.

. 'imumnmnnuunm PATENT OFFICE.

HARRY L. IDE, OF SPRINGFIELD, ILLINOIS.

nLEcir'nIcAL TRANSFORMER.

Toazfzwhma" yam-waa.- "Be it known that I, HARRY L. Ion, EcitidftheUni'tedStates; 'residing at Springfield, in the'gcoi'i'nty/fSangamon and State "o'f' Illinois, "havelinyented" a certainl new and useful Im rovenieiit; in Electrical Transformers, o 1irhich :the following isa full. clear, concise, and eiiaet description; i Mynventio, Y former' andfempldysttvf relatively movable members; Ione" including a plurality of coils ofl dier'in' A of f t'urlis a" d the other inciudiiigz'i1 coil' adapted tobe-` into and out ofitshfulli A v i any c ii "first f pimber I' by relative I ovem'ent ,between vlthe"ifembersl` "i f Inj'the preferred embodiment ofjthe" inven- 'ti'on'each'ofltlienie'mbes f the transformer is' rotatable' and includes 'aplurality of coils of differing 'numbers"ofturnsl arranged in a circular row whose aitisissubstantiailly coincident with the axis of relative rotation of said.meibers`,`each coil ofV one member be'- ingadaptd be'brought'intol and. out of "its" full inductiyefrel'ation with any fc'o'il of the other member by relatively moving said members. A switch isl desirably coupled lWith eachr'neinber and connected to be operated by such member to include in circuit onl the coil V'of isuch member that is placed toe inits full inductiye relation with a 'selected coil o f the other member. Inl the"transformer,l of my invention the ratio oftransformation betweenthe primary and secondary coils may readily be adjusted without rewinding either of the coils. *.The'tr'ansfimer 'of my invention is of particularseityice. when employed in Wireess' systems of. communication and especially in thereceivingr equipment Vof such stems' although-.the inventionis not to be vliriiitedt'o anymparticular use to which it lmay be pt: en' em'ployed in the receiving station of the .wireless telegraph or telephonesystem, the transformer may be emplo tiinetheA primary aerial circuit andy may be asojemployed lto adjust the inductive relative betweenthe so-called tickler circuit and the seconda circuit of the receiving. equipment if suc equipment should employ a tickler circuit. When a transA former includes rotatable members each having a circular roW'of .coils ofdiflering numbers of turns' a very Wide adjustment of the ratios of transformation' is possible of the inductively relatedcircuits.

. ...Specification of Letters Patent.

VApplicatie'n ledctober G, 1920. maiala um" .2 .2- L

relaites to lelectrical'transina-active eiafioaiwith n mary coil 2 which' is shunted by a variable 'transformen 'set forth in the text book by E Patented Oct. V25, 1921.

Serial N0. 415,033.

I irill'expla'in myinvention more fully lby reference to *the accompan ing drawing showing an adaptation'thereo to a wireless receiving station equipment. In'1tlie draw ing Figure 1 is a longitudinal sectional view of one embodiment of thetransformer of my invention; F ig. 2 is a sectional 'view on line 2 2 of Fig. '1; and Fig. Sis a diagram Villustrating one wireless telegraph receiving station circuit arrangement.

Like parts are indicated by similar characters'of reference throughout the different figures.`

Thea'erial 1 is grounded through a pricondenser 3. A secondary coil 4, in conjunction with the primary coil 2, forms a tuning Thel transformer coil V5 is in secondary relation to the coil 4, the Whole arrangement illustrated in Fig. 3 being what is termed a. three honey comb coil arrangement usedas an inductively coupled tuner with an inductive regenerator cou ling as imer E. Bucher entitled The lfVareZess E'perimentars Manual copyrighted in 1920.

In the device of my invention, as the invention is preferably practised, there are a number of coils 2, of differing numbers of turns. that are interchangeable in the aerial circuit, and there are also a number of tuning secondary coils '4, of differing numbers of turns1 that are interchangeable in the secondary or tuning circuit. lf a tickler circuit is employed there may be a number of coils 5, of differing numbers of turns, that are interchangeable in the tickler circuit.

The members of the transformer respectively having the coils 2, 4 and 5A desirably include disks of wood or other insulating material 6 which are (fo-axial and rotatively mounted upon and with respect to a shaft 7 that passes through and is co-aXial with these disks. Each disk is provided with a circular row of openings that is co-axial with,

the shaft and therefore with the axis of rotation of the transformer members. these openings receiving the coils which are positioned to have their axes substantially parallel with the common axis of rotation of the transformer members. There is thus provided upon each transformer member a circular row of coils of differing numbers of turns` such circular row being substantially cti-axial with the common axis of rotation of the transformer members. ivhile the coils of each transformer' member are desirably substantially evenly distributed about the common axis of rotation of the members, I do not wish to be limited to the extent of each circular row of coils as it is'obvious that the row of coilsfupon each member of the transformer may extend throughout only an arc of a circle as Well as throughout a complete circle andthe expression circular row is used herein in this broader aspect.

Each of the disks 6 is provided with notches l8 in its periphery to receive the holding springf) mounted upon the base l() of the equipment. When embodied as illustrated and described, the middle disk 6 that earriestbe tuning secondary coils 4 is limited to a single plane of rotation by means of the guidesll between which the disk 6 carrying these secondary coilsis disposed. The end disks (i5-which respectively carry the aerial primary .coils 2 andthe. tickler coils 5 are also movable along the shaft 7 whereby the inductive relation'between the coils 2 and 4 and also Athe inductive relation betweenA the coils 4 and '5 may be adjusted by the longitudinal movement of the outer carriers 6. In order that` each of the outer carriers or disks Gymay be longitudinally movable and yet may beheld in any position of rotary adjustment, the outer holding springs 9 are elongated to be co-extensive with the range of longitudinalmovement of the end disks 6. A.The mechanism that is preferably employed for effecting the longitudinal movement` of earh end disk includes a bar 12 screwed to the outer face of each end collar 6' and passing through a slot 13 formed in -eachfrouter end of the shaft 7, this shaft 4being held fromrotation by means of a set screw. 14 passing into engaglement with the shaft through one of the s aft supporting uprights 15. Each of the threaded rods 16 .has a square end portion 17 passing through the correspondingly shaped hole in the corresponding bar 12 whereby each rod 16 is held from rotation. The collars 6 are flanged at their inner and outer ends to formannular recesses in which the end disks 6 are received, these end disks being rotatable upon the collars which themselves are prevented from rotation by the construction just previously described. The rods 16 are iu threaded connection with the end plates 18 that are screwed upon the hand wheels 19. The coiled springs 20 surround the outer portions of the shaft 7. The inner ends of these coiled springs press against the bars l2 and their outer ends press against the uprights 15 whereby the hand wheels 19 are confined to single planes of rotation to which they are subject whenever the end disk 6 and the transformer windings upon these disks are to be moved in or out, such in and out movement of these end disks resultin because of the anchorage of the inner ens of the rods 16 to the bars 12 and the threaded connection of these rods with the end plates 18.

In the preferred embodiment of the invention a switch is coupled with the disk 6 of each transformer member, such switch being connected in a manner to cause only one coil to be included in the transformer circuit corresponding to the transformer member having such coil. Each switch includes a pairv of Wipers 21 and 22 mounted upon the non-rotatable collar 6 in the case of the outer transformer members and upon the non-rotatable collar 62 in the case of the intermediate transformer member. The outer ends of these wipers 21, 22 are in the circle of the correspmding circular row of contacts 23, 24. ach coil of eachtransformer member has a pair oflsuch contacts which is brought into thev corresponding ltransformer circuit when e aging ythe outer ends of the brushes 21, 22 xtat constitute switchin terminals of such circuit, lVhile I Aprefer to provide each member of the transformer with a plurality of Vcoils each adapted to replace another in its transformer relation, I do not Wishto be limited to this arrangement as it is obvious that one member of the transformer may have only one coil adapted to be brought into transformer relation with any of the coils of another member. I prefer, however, to provide each transformer member with a plurality of ycoils as the range of adjustment of the ratio of transformation is thereby 100 so largely extended.

While I have herein shown and particularly described the preferred embodiment of my invention I do not Wish to be limited to the precise details of construction shown as 105 changes may `readily be made without departing from the spiritof my invention, but having thus described my invention I claim as new and desire to secure by Letters Patent the followingt- 1. An electrical transformer comprisin two relatively movable members, one mcluc ing a plurality of coils of differing numbers of turns and the other including a coil adapted to be brought into andout of its 115 full inductive relation with any coil of the first member by relative movement between the members.

2. An electrical transformer comprising two relatively movable members, each in- 12o Vcluding a plurality of coils of differing numbers of turns, each coil of one member being adapted to be brought into and outof its full inductive relation with any coil of the other member by relatively moving said 125 members. Y

3. An electrical transformercomprising two relatively rotatable members, one including a plurality of coils of diifering numbers of turns arranged in a circular row 130 whose axis is substantially coincident with the axis of relative rotation of said members and the other including a coil adjacent said row of coils and adaptedto be brought into and out of its full inductive relation with any il of the first member by relative movement between the members.

4. An electrical transformer comprising two relatively rotatable members, each including a plurality of coils of differing numbei's of turns arranged in a circular row whose axis is substantially coincident with the axis of relative rotation of said members, each coil of one member bein adapted to be brought into and out of its A inductive relation with any coil of the other member by relatively moving said members.

5. An electrical transformer comprising two relatively movable members, one including a plurality of coils of differing numbers of turns and the other including a coil adapted to be brought into and out of its full inductive relation with any coil of the first member by relative movement between the members; and a switch operated by the member that is moved and connected to establish the circuit of any coil of the first member when this coil is placed relatively to said coil of the second member to be in full inductive relation therewith, said switch then excluding the remaining' coils of the first member from circuit.

G. An electrical transformer comprising two relatively rotatable members, one including a plurality of coils of differing numbers of turns arranged in a circular row whose axis is substantially coincident with the axis of relative rotation of-said members and the other including a coil adjacent said row of coils and adapted to be brought into and out of its full inductive relation with any coil of the first member by relative movement between the members; and a switch operated by the member that is moved and connected to establish the circuit of any coil of the first member when this coil is placed relatively to said coil of the second member to be in full inductive relation therewith. said switch then excluding the remaining coils of the first member from circuit.

An electrical transornwr comprising two movable members, each includinglr a plurality of coils of differing numbers of turns, each coil of one member being adapted to be brought into and ont of its full inductive relation with any coil of the other member b r relatively moving said members; and a switch coupled with each member and connected to be operated by such member to include in circuit only the coil of such member that is placed to be in its full inductive relation with a selected coil of the other member.

S. An electrical transformer comprising two rotatable members, each including a plurality of coils of'differing numbers of turns arranged in a circular row whose axis is substantially coincident with the axis of relative rotation of said members, each coil of one member being adapted to be brought. into and out of its full inductive relation with any coil of the other member by relatively moving said members; and a switch coupled with each member and connected to be operated by such member to include in circuit only7 the coil of such member that is plat-ed to be in its full inductive relation with a selected coil of the other member.

ln witness whereof I hereunto subscribe my name this 4th day of October `A. D. 1920.

HARRY L. IDE. 

